BLE Not Scanning In Simulator

Hi all,

I have side loaded my custom app, which is very similar to the nordic Blinky IQ data field app, to a vivoactive 4s but there seems to be an error when connecting to the peripheral. This observation is based on the device's generated log file. I want to continue debugging in simulation, but I can't get the simulator to scan, so I wanted to see if someone could help me figure out where I'm going wrong.

I have followed the wiki on setting up the simulator to use ble but have not been able to log any scan results. The last log output I get is from the onScanStateChange function showing the scan state is scanning and the status is successful. I would expect the function onScanResults to be called next, but it is not.

I have tried both 4.1.2 and 3.2.5 SDKs. I have tried both the nrf52 dongle & dk with their appropriate firmware from the wiki. I have set the USB port in the simulator (also tried setting to something that causes an error then putting back to the correct port as this was mentioned in an older post). I have tried both a Mac and a Windows 10 environment.

Thanks

0 jim_m_58 over 3 years ago

Start with the nordicthing52 sample in the SDK and in ThingyDelegate.mc, add the following println to the contains function:

    private function contains(iter as Iterator, obj as Uuid) as Boolean {
        for (var uuid = iter.next(); uuid != null; uuid = iter.next()) {
        	//add next line
        	System.println("found="+uuid.toString());
            if (uuid.equals(obj)) {
                return true;
            }
        }

        return false;
    }

Add the va4 as a target, run it, and long press the lower button. You'll get a menu with the first option being "start scan". Select it.

What you'll see is any uuid seen when scanning. This will insure everything is set up correctly. Look for the uuid you are trying to use to make sure it's advertising correctly

On the real device, you can download this app: https://apps.garmin.com/en-US/apps/9bcc8b66-8385-4afb-b93e-f69e01422284

It will scan and show you all BLE devices that the device can see when scanning.

0 jim_m_58 over 3 years ago in reply to jim_m_58

If you can, try the 4.0.10 and make sure the BLE settings in the sim are correct. I'm seeing an issue with 4.1.x with one app.

0 ryry14 over 3 years ago in reply to jim_m_58

Awesome! Thank you The scanning works with the thingy52 app, so the issue is elsewhere in my app. Maybe because it's a datafield? Not sure, but I'll look into the thingy52 example for a fix.

0 jim_m_58 over 3 years ago in reply to ryry14

The thingy52coincollecter sample is a data field so maybe look at that.

0 ryry14 over 3 years ago in reply to jim_m_58

Interestingly, the regular thingy52 app works fine while the coincollecter doesn't scan in the simulator. I verified the app calls the function to start scanning (BluetoothLowEnergy.setScanState(BluetoothLowEnergy.SCAN_STATE_SCANNING);). My guess is that there needs to be a delay before the scan state can be set since in the regular thingy52 works just fine with user input to set the scan state.

0 jim_m_58 over 3 years ago in reply to ryry14

I've used the coin collector sample myself. Try again, but using the 4.0.10 SDK. There could be a bug in the 4.1.x SDKs

0 ryry14 over 3 years ago in reply to jim_m_58

I'm using 4.0.10

0 jim_m_58 over 3 years ago in reply to ryry14

With the coin collector sample, it will be looking for a specific uuid - namely the thingy52, Are yousure it's not just scanning for that?

0 ryry14 over 3 years ago in reply to jim_m_58

I added a print statement in the contains function like that of the NordicThingy52 example, so it should be printing out all the scan results.

0 CYBERMAN54 over 3 years ago in reply to ryry14

I'm still facing the problem that my View App, based on the template for "Thingy Coin Collector" does not start the BLE scan. The event "onScanResults" never fires.

The NordicThingy samples by Garmin in the SDK are hard to read, because they use a high level of abstraction (Datamodel, Devicemodel, Profilemanager, ...). Is there a more simple example which just reads a value from a BLE device and displays it in a datafield? I found some code snippets in github, but not sure if they work. I had no success so far for my use case.